How do catch Mewtwo without master ball?

Answer 1

The only place I know mewtwo is available at is the cerulean city cave (for those who don't know,you have to beat the elite four to have access to it).I always used my masterball on mewtwo and ultra balls on the 3 birds...but here is how..

Step 1 - have you party all level +70 & teach some of your Pokemon status moves (i recommend hypnosis,sing or sleep powder)

Step 2 - buy some ultra balls (cinnabar),about 2-3 max revives,5 full restores/super or hyper potions & 5 max elixers (Pokemon league)

Step 3 - make your way through the cave to mewtwo.

Step 4 - once you reach mewtwo,save your game in case mewtwo starts giving you a tough time or if you run out of items.

Step 5 - start the battle & do your best to weaken mewtwo without making him faint (if he faints,reset your game and try again)

Step 6 - once mewtwo is in the red,try putting him to sleep & use your ultra balls (if mewtwo is asleep,you should be able to capture him)

Hope this helped :)